Paper feed



Aug. 12, 1941. c. H. PETSKEYES ETAL 2,252,023

' PAPER FEED Filed Feb. 27, 1939 2 Sheets-Sheet l Charles A. Pezsfbe as/5 and Israel 6 fiellm IN VENTORS f/mk/ ATTORNEY.

Aug. 12, 1941.

c. H. PETSKEYES ETAL v PAPER FEED 2 Sheets-Sheet 2' Filed Feb. 27. 1939deye M fsraeLC 661117? 72/ INVENTORS- Charles 11 Pezfsfi BY f/lflATTORNEY.

Patented Aug. 12, 1941 PAPER FEED Charles H. Petskeyes, Davenport, Iowa,and Israel C. Gcllman, Rock Island, 111., assignors to GellmanManufacturing Company, Rock Island, 111., a corporation of IllinoisApplication February 27, 1939, Serial No. 258,672 I 8 Claims.

The principal object of this invention is the provision of improvedpaper feeding and measur-'- ing means for use in wrapping machines.

Viewed from another aspect, the invention has among its importantobjects the provision of adjustable means, cooperably driven withcertain Wrapping mechanism in a wrapping machine, for

Fig. is a diagram illustrating the timing and carry-over feature;

Fig. 6 is a fragmentary sectional elevational view as seen from line 6-6in Fig. 2.

Referring to Fig. 3, a preferred arrangement includes asource of supplyof paper webbing in the form of a roll of wrapping paper II! rotatablysupported on a spindle II removably seated inslots l2 in cradle arms l3projecting from opposite frame members M of the main frame structure.

The web of paper I5 is fed up over a feeding roller 16 journaled' inopposite projections ll (Fig. 1 also) on frame members l4 above thesupply roll, and as shown in Fig. 2, one end 20 of the feed roller iskeyed as at 2| to the spindle 22 of a driven ratchet device having anend plate 23 rigid with the spindle and on which is mounted a pawl 24urged by spring means 25 into driving engagement with ratchet teeth 26aon a driven gear 26 which floats on a stud 21 integral with the spindle22. When the gear 26 is rotated in one direction, the pawl 24 catchesand rotates the feed roller l6 (Fig. 6).

Mounted at intervals across a shaft 30 (Figs. 2 and 3) are a pluralityof friction presser rollers 3| which are pressed against the paperwebbing on roller I6 by virtue of the fact that the shaft 30 isjournaled at its opposite ends in eccentric arms 32 pivoted as at 33 onthe frame and each normally urged'by eccentric springs 34 toward thefeed roller.

The presser-roller shaft 30 is driven cooperthe arm 32 back toward thefeed roller.

ably with the feed roller through the agency of a driven pinion 40(Figs. 1 and 2) thereon which meshes with a driving pinion 4i rigid onthe ratchet spindle 22.

Means for moving and holding the presser roller out of pressingengagement with the feed roller-includes the provision of a hand leverpivoted as at 46 on the frame and having a cam part 41 arranged to rideinto and out of an eccentric notch 48 on one of the eccentric arms 32.Thus, when the lever 45 is turned clockwise in Fig. 1, the cam portionrides into the notch on the eccentric arm and pivots the latter aboutthe point 33 and moves the rollers 3| away from-the feed roller.Movement of the lever 45 in the opposite direction back to the positionof Fig. 1 permits the spring 34 to urge This presser operating andcontrol means 32-34-45 is duplicated on opposite sides of the machine,for convenience.

By cooperation of the feed and presser rollers,

as aforesaid, the webbing i5 is fed over a stationary horizontal knifemember 5|] (Fig. 3) beneath a guide means or apron 5!, which preventsthe paper from curling up or back when it is cut, the paper continuingacross an opening which is (at times) bridged by the lower level 52 ofan elevator mounted atop a vertically reciprocable elevator post 53until the end l5a of the paper webbing lies on a holding table 54 at theopposite side of the elevator opening.

When the elevator starts down from the fully raised position shown inFig. 3, a knife bail 58, pivoted on the frame as at 59 is permitted todrop by its own weight (having been previously raised by the risingelevator into the position' of Fig. 3) and a movable knife or shear 60pivotally mounted by hinge means 6| thereon, shea-rs the webbing IS incooperation with the stationary shear 50. The knife bail structure isdescribed and claimed in our copending U. S. application, Serial No.258,676.

Means for grasping and holding the sheared sheet of wrapping materialincludes a holding bail 62 extended crosswise of the sheet above theelevator and holding table 54, the bail being mounted in a, pair of arms63 pivoted as at 64 on a tail 65 of the knife bail. This mounting,together with the provision of quick-action operating arms 66, pivotallyattached as at 61 to each of the bail arms 63 and each coacting withspring means 68 on the shanks of thumb screws 69 severally attached tothe bail arms 63, effects a snapping of the holding bail 62 toward thetable '54, to and from the position of Fig. 3 as a result of the up anddown movement of the elevator.

When the elevator starts down, the quickaction arrangement causes theholding bail 82 to be quickly dropped down against the end l5a of thesheet of paper (the latter being severed from the main web atsubstantially the same time by downward movement of the knife ball asaforesaid) with the result that one end l5a of the severed sheet isclamped against the holding table 54. i

As the elevator continues downward, the free end of the cut sheet lowersuntil the sheet is hanging nearly vertical from table 54. At this time,by means not shown herein, but described and claimed in our copending U.S. application,

Serial No. 258,674, an article such as a loaf of.

bread will be moved horizontally against the hanging sheet and onto theupper level 55 of the elevator, so that the loaf is initially andpartially wrapped- As a result of movement of .the elevator into raisedposition (Fig. 3), certain intermediate wrapping operations are effectedthrough engagement of the protruding parts of the sheet with memberssuch as the arm 18, and

through the agency of other wrapping means not all shown herein.

For purposes of understanding the present invention, it is sufficient topoint out that when the loaf reaches fully elevated position, it issubstantiallyv wrapped save for certain end folds which are effected bymoving the loaf sidewise between opposite terminal fold plates ll so asto cause the incomplete end folds or tails to ride into arcuate tracks12 for the final folding operation.

Movement of the elevated loaf into the terminal fold means isaccomplished by a pair of reciprocal transfer arms 13 depending fromsleeve brackets 74 sliding on horizontal rails 15 above the elevatedloaf. The transfer arms are shifted from normal position (Fig. 3)against the side of the loaf to move the latter in between the terminalfold plates H, at which time the elevator may start down.

Mechanism for actuating the transfer means '|314 in timed relation tothe movement of the elevator and other wrapping instrumentalities of themachine, includes offset drive or crank arms 15 (Fig. 1only one beingseen) mounted for oscillation at their ends 18 on a cross shaft 11 rigidtherewith and joumaled in the main frame. The drive arms oscillate inthe direction of reciprocation of the transfer arms 13, but at anopposite end of the machine from the latter, connecting rods 18, eachattached at one of their ends to the offset parts 19 of one of the drivearms, and at their respective opposite ends 88 to one of the sleevebrackets I4, providing a driving connection between crank arms 15 andthe transfer fingers. Thus, when the crank arms are oscillated, thetransfer arms are reciprocated.

One of the crank arms 15 has a cam follower which rides in the camgroove or track 8| of a rotating cam 82 on a shaft 83 which has drivingconnection (Fig. 4) with a central drive system or power plant, andwhich moves the crank 15 back and forth in timed relation to themovement of the elevator and associated wrapping mechanism.

The paper measuring device is arranged for timed coaction with the otherwrapping mechanism through an adjustable driving connection with thetransfer operating crank means. To this end, one of the drive cranks 151 ,5 a forthe form of a sliding block 81 threaded on an adjustingspindle or screw 88 joumaled in the guideway and arranged to be rotatedby a hand crank 89 for the purpose of causing the block or rider 81 tomove back and forth in the guideway.

Projecting from the adjustable fulcrum block is a stud 98 to which ispivotally attached one end part 9| of a drive rod 92. The opposite endof the drive rod is provided with a rack of teeth 93 and is slidablymounted for rocking reciprocation on rollers 94 secured by pins 95 to arocking plate 98 which is pivoted on a stud bolt 91 in the frame andwhich in turn mounts a gear 98 meshing with the ratchet gear 26. Thedrive rod is fitted in behind the gear 98 with its rack of teeth meshedwith a reduced inner gear toothing 99 forming a part of gear 98.

By turning the adjusting crank 89, the stud or pivot member 88 is movedto any desired position along the guideway on the drive crank toposition an ndex on the drive rod connection 9| opposite desired numberindication along the guide member, these latter indications beingcalibrated to indicate the number of inches of paper to be fed. In thisway the adjustable lever, pivot, or fulcrum connection between the crank15 and the drive rod 92 is changed to vary the stroke thereof with aconsequent variation in the rotative movement of gear 98.

When the drive rod 92 moves in one direction (right, Fig. 1) ratchetgear 26 slips past the pawl so that the paper feed roller is not turned,but when the drive rod moves in the opposite direction, the pawl 24takes hold and the feed roller I8 is turned to advance a portion of thewebhow much, depending upon the setting of the fulcrum block relative tothe indicia on its guideway. The advance or feeding of the web occurs ata time when the transfer fingers are moving the nearly wrapped loaf inbetween the terminal wrapping plates.

The form of the cam 82 determines the relative rate and period ofoperation of the drive crank and drive rod with respect to the otherwrapping mechanisms, and the elevator waits in raised position while thetransfer arms remove the bread therefrom and while a new portion ofwebbing is fed across the lower level of the elevator.

An important feature of the timing is the arrangement of the cam 82 togive the drive rod 92 a slight but definite forward (left, Fig. 1) pullat the moment the elevator moves into fully raised position. Theadvantage of this resides in the fact that the machine is arranged andconstructed to complete each wrapping cycle or oper ation when theelevator moves into raised position. This is accomplished through aspecial clutch connection with the power plant for the machine, thearrangement being such that there is always a slight carry-over of thecam 82 from and due to the congealing of wax, generally, when themachine is allowed to stand idle for any appreciable period. Thus, ifthe machine is shut off, the waxed paper will be given a slightadvancing movement to loosen it, and there will be no danger ofsticking, such sticking being highly objectionable because it results inbunching of the paper and jamming of the machine.

This terminal kick or momentary advance of the web at the end of eachwrapping cycle is accomplished by the mechanism shown in Fig. 4 whereinthe cam shaft; 83 is shown to be connected through a special clutch I Iwith a sprocket III floating on shaft 83 and driven by a motor 2constituting a central power plant or drive means for the machine. Atthis juncture, it may be observed that the elevator 53-is cooperablydriven with the actuating means for the proper feed through the agencyof a second cam H3 on shaft 83 and crank means lll-II5. The cam 82 andassociated crank I5, adjustable pivot or fulcrum means B590--92,constitute a cyclically operable actuating mechanism for the paper feed,and this actuating means coacts M8 (see Fig. 5) which is normally urgedby a spring H9 into driving engagement with the ratchet.- A manuallycontrolled lever I is connected with a pivoted release and stop I2!arranged in the path of the pawl so as to lift the latter out ofclutching engagement with the ratchet once per revolution of the clutchassembly. In this sense, the clutch is cyclically operable, and uponeach cycle of operation thereof the wrapping mechanism is driven throughone complete wrapping cycle or operation.

The cam 82 is so arranged in its evolution that for every completerevolution of the shaft 83, corresponding to one complete wrappingcycle, the cam 82 will travel through one complete cycle and a smallpart of the next cycle. As a result, when a complete wrapping operationis finished, the elevator 52-55 rests in raised position, while thedrive rod 92 is moved slightly to advance the free end of the paperenough to prevent its sticking or becoming fixed, so that the danger ofjamming is obviated-especially where the machine lies idle for anylength of time between wrapping operations.

The foregoing phase relationship between the cyclic operations of thewrapping mechanism and paper feed is diagrammatically illustrated inFig. 5 wherein the parts are identified in their respective positions atthe completion of one moved slightly past (downward) the lowest nose I26on cam 82, movement between the nose I26 and the point I2I correspondingto paper feeding movement of the drive member or stroke arm 92.

The objects and advantages of the invention 4 may be realized in. otherforms of construction, arrangement and modes of operation of the partsspecifically described herein for purposes of illustrating a preferredembodiment, and the appended claims therefore are intended to includeall equivalent arrangements fairly coming withdrive means to effect onecomplete wrapping operation of said wrapping mechanism, said cyclicallyoperable actuating mechanism being arranged and constructed to completeone cycle of operation and a part of another cycle during each operatingcycle of said wrapping mechanism following operation of the clutch meansas aforesaid, whereby said webbing may be partly advanced at thecompletion of each wrapping cycle to prevent the severed portion of saidwebbing from becoming fixed following each severing operation.

2. In a wrapping machine, a source of driving power, paper feeding meansarranged to feed measured amounts of wrapping paper relative to wrappingmechanism in said machine, cyclically operable drive means for actuatingsaid feeding means, and cyclically operable clutch mechanism arrangedfor operation to connectsaid cyclically operable drive means with saidsource of driving power, said cyclically operable drive means beingarranged and constructed to provide a carryover whereby said cyclicallyoperable drive means will be driven a predetermined amount aftercompletion of each cycle of operation thereof upon each operation ofsaid clutch mechanism.

3. In a wrapping machine, wrapper feed means arranged for actuation tofeed measured lengths of wrapper, cyclically operable drive meanscoacting with said feed means to actuate the latter so as to feed one ofsaid lengths of wrapper for each cycle of operation thereof, andcyclically operable clutch means operatively connecting said drive meanswith a source of driving power,

.said clutch means being arranged and constructed to be operated toinitiate a cycle of operation of said drive means, and the latter beingarranged in such manner that upon each cycle of operation thereof, saidcyclically operable drive means will be driven through one cycle and apredetermined fraction of the next cycle, whereby said wrapper materialwill be advanced in feeding movement following each actuation of saidfeed means upon operation of said clutch means.

4. In a wrapping machine, in combination, means for feeding a waxedwrapper from a web and severing the same, and mechanism includinginstrumentalities for wrapping an article in said wrapper and includingcoacting power drive and clutch means arranged for actuation to completeone cycle of operation to feed and sever a wrapper and wrap an articleas aforesaid, said drive and clutch means being further arranged andconstructed to advance said web in feeding movement a certain amount atthe conclusion of each said cycle to assure that said web shall'notstick as a result of the severing operation.

5. In a wrapping machine, in combination, wrapping mechanism arrangedfor actuation to effect a series of complete wrappmg operations andcoacting with web feeding and severing means to advance and sever awaxed wrapper prior to each wrapping operation, power-driven means forenergimng said mechanism and coacting means, and a clutch drivinglyinterconnecting said power-driven means and mechanism and arranged foroperation to eifect energization of said mechanism for one completewrapping operation as aforesaid and a fraction of another wrappoperation sufficient to advance said web before disconnecting saidmechanism from said drive means whereby to dislodge said web to avoidjamming the machine by sticking of the web as a result of severing thesame.

6. In a wrapping machine, in combination, a

rotatable drive shaft, power means for driving said shaft, a clutcharranged for operation ;to interconnect said shaft and power means forthe duration of a complete revolution of the latter by the former and afraction of another revolution and thereafter to automaticallydisconnect said shaft from said power means, wrapping mechanism, meansenergized by said shaft forvactuating said wrapping mechanism andarranged to effect a complete wrapping operation for each revolution ofthe shaft, means for feeding webbing for wrapping purposes relative tosaid wrapping mechanism and severing a predetermined length of thewebbing to provide a wrapper for each complete wrapping operation asaforesaid, said severing means being actuated prior to or not later thanthe completion of each revolution of said shaft so that said webbingwill be advanced by the additional revolution of said shaft beforedisconnection of the latter by said clutch from said power means.

7. In a web feeding and severing mechanism, in combination, cyclicallyoperable means for feeding predetermined lengths of webbing relative tosevering means, a source of driving power, clutch means operable tointerconnect said cyclically operable means and said source of power todrive the former through one complete operating cycle and a fraction ofthe next cycle and thereafter disconnect said cyclically operable meanswhereby to advance more than said predetermined length of webbing, andsevering means driven cooperably with said cyclically operable means tosever said web prior to the disconnection of the cyclically operablemeans by the clutch means as aforesaid whereby a portion of said webbingless than said predetermined length will be advanced following eachsevering operation to dislodge said webbing in the event the same sticksor is otherwise arrested, whereby jamming of the machine may beprevented.

8. In a sheet feeding and severing machine, means for feeding waxedsheeting with respect to severing means, a power source, clutch meansconstructed to be set for operation to interconnect said first-mentionedfeeding means with said power means for operation to feed apredetermined length of sheeting and thereafter automatically disconnectsaid feeding means, and severing mechanism driven cooperably with saidfeeding means through the agency of said clutch means for actuation onceduring each feeding operation to sever said sheeting in a length lessthan said predetermined length priorto the disconnection of said feedingmeans whereby an additional length of sheeting will be fed followingeach severing operation to loosen said sheeting in the event the samesticks as a result of the severing thereof, whereby to prevent jammingof the machine.

CHARLES H. PETSKEYES. ISRAEL C. GELLM'AN.

